Railway safety appliance.



Nonsgmog. v PATIENTVED JULY 28,1908,

M. E. HOGAN.

RAILWAY SAFETY APPLIANCE,

. APPLICATION FILED 21:13.4, 190s."

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UNITED STATES PATEN T OFFICE.

MICHAEL E. HOGAN, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO JAMES E. DOUGHERTY, OF CHICAGO, ILLINOIS.

RAILWAY SAFETY APPLIANCE.

eago.,eou 1t v of Cook, and State of Illinois,

have. invented certain new and useful Improvements in Railway'Safety Appliances, of which the following 18 a specification.

plian -es and has-particular reference to de vices for automatically stopping a train to prevent the same from passing a danger signal.

The object of my invention is to provide an ap liance for railway trains which will automaiicallv operate to throw on "the brakes of a train and to close the throttle of the engine when the danger signal is set.

A further object of my invention is to provide a device asmentioned, so arranged that the brakes may be relieved by thaengiiieer from the cab after having been automatically set.

Other objects will appear hereinafter.

My invention will be more readily understood by reference to the accompanying drawings forming'a part of this specification and in which,

Figure 1 is a diagrammatic end elevation of a locomotive equipped with a device cinbpdying my invention in its preferred form, and Fig. 2 is a diagrammatic side elevation thereof, and Fig. 3 is a modified form of trip.

Referring to the drawings, 1 indicates the cab of a locomotive, 2 the boiler and 3 the -=-side sheets of the furnace, and a the main air reservoir. Leading from the tank or reservoir, 4 is a )ipe, 5 by which the air is supplied to the bra e system of the train.

6 is a valve for controllin the admission of air to the pipe, 5 hence to the brakes The valve 6 is automatically operated in the following manner: 7 indicates disk connected to the air valve in such a manner that rotais in the path of the arm, 9.

tion of the disk in one direction will 0 en the valve and in the other direction'will c ose the same. Depending from the disk is an arm, 8, which is preferably 2 shaped as shown terminating in the horizontal portion, 9. When the danger signal is set a rod or trip bar, 10 is raised into the position shown in full lines in Fig. 1. The rod, 10 is arranged inside of the rail'and when in raised position When the arm 9 contacts the rod, 10 the disk, 7 is rotated opening the valve, 6 and throwing on the Specification of Letters Patent.

Application filed February 4, 1908. Serial No. 414,158.

simultaneously therewith. 0 u i My invention relates. to railway satety ap- Patented July 28, 1908.

brakes of the train. Extending from the pipe, 5 or from the air brake system, is apipe, 11 leading to a cylinder, 12, the. piston, 13 of which is connected to the throttle lever, 14, in such a manner that when, the air is admitted to the air brakes the throttle is closed I desire to have the device under the manual control of the engineer from the cab, that It is obvious is, while the device will be automatically operable in the manner described, to close the throttle and throw on the brakes if the signal is disregarded, the engineer may there after relieve the brakes and the throttle without leaving the cab.

15 indicates a disk, rotatably mounted within the cab. This is connected by the cables, 16 to the disk, 7 in such a manner that when the disk, 7 is rotated as before described, the disk, 15 will also be rotated. To shut off the air from the air brakes, the engineer has but to return the disk, 15 to normal position, the disk being provided with a handle, 17 for this purpose and a stop, 18 being provided to limit its movement.

lgindicates a threeway valve for relieving the pressure in thesystem and in the cylinder, 12 after the valve 6 is closed.

The operation of the device is as follows: When the danger signal is set, the rod, 10, is raised into the position shown in full lines in Fig. 1. If the engineer for any reason should disregard the signal, the arm, 9 when it engages the rod, 10 will automatically open the valve, 6. This throws on the brakes and closes the throttle in the manner betore described. As the valve, 6 is opened, the disk.

15 is turned into the position shown in dotted lines in Fig. 2. Before the eng neer can start the tram, the disk, 15 is returned to normal position shuttilu oil the air tank or reservoir,

4 from the air brakes. The valve, 19 is then opened to exhaust the air l'rom the brake s *stem. and from the cylinder, 12 alter which the engine may be started in the usual manner.

if the pilot is low or a brake beam or other part is hanging low. epnsiderablc damage might be done, by striking the trio-d n is a solid non-yielding member. in Fig. I, I have illustrated a modified i'orm ol' trip which is yieidingly held in position, so that ii a fixed portion at the train should strike it, it will be ltd depressed, but will immediately return to normal operative position.

20 indicates the trip, pivotally mounted by the gudgeons, 21-, formed of the operating arranged rod, in slots, 22 in the housing 23. a I

24 are a plurality of springs for yieldingly holding the tri in position, and between the springs, 24 anc the trip, 20 is a follower, 25. The boxing, 23 is arranged below the level of the rail and the trip, 20 extends above the rail when in raised or operative position. The operation of the device is obvious. Having described my invention what I claim as new and desire to secure by Letters Patent is: V

l. A locomotive and the 'air brake system of a train including the main air reservoir, in

ends of a boxing or combination with a'valve controlling the exit R of air from said reservoir, a pipe leading from said valve to said brake system, the throttle lover, a lever throwing device, a branch pipe leading from the first pipe to a point behind said ,throttle lever for actuating said lever throwin device, an arm onsaid valve, means within the rails for tripping said arms to open said valve, means operable from within the cab for resetting or closing said valve, and a valve in the last said ipe and within the cab ada ted to be manna ly operated for relieving t ie' pressure on the brakes and the throttle, substantially as described.

2. In a device of the class described, the locomotive and the air brake system of a from within the cab for actuating train, including the main air reservoir, in comcylinder arranged adjacent to the throttle lever, a pipe extending from the first said pipe to said air cylinder, a manually o erable valve interposed in said pipe Wi thin t 1e cab for exhausting the air from said pipes ai'terthe first said valve has been closed, and means operable said rotary member to close said valve, substantially as described.

3. Ina device of the class described, a

locomotive and the air brake system oi a train including the main air reservo1r,1n com-.

bination with a valve arranged on said reservoir, means automatically operable for openmg said valve to throw on the air brakes and close the throttle, means operable from within 4 the cab after the device has been automatically actuated for closingsaid valve, and avalve arran ed in the cab for relievim the pressure within said system, substantially as described.

In testimony whereof I have name to this specification in the two subscribing witnesses.

n MICHAEL E. HOGAN.

signed my presence of Witnesses:

. HOWARD S. AUSTIN, ARTHUR A. OLSON. 

